<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" stripe border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 下方图用到栅格系统布局，作用域插槽获取数据 -->
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"  v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)" >{{ item1.authName }}</el-tag
                ><i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)" >{{ item2.authName }}</el-tag >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)" >{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-danger" size="mini">删除</el-button >
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)" >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogVisibleClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef" ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      // 所有权限的数据
      rightslist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 树形控件的绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色Id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败!");
      }
      this.rolelist = res.data;
    },
    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm( "此操作将永久删除该文件, 是否继续?", "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除!");
      }
      // console.log('确认了删除');
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      // this.getRolesList()
      role.children = res.data;
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId=role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表数据失败!");
      }
      //把获取到的权限数据保存到data中
      this.rightslist = res.data;
      console.log(this.rightslist);
      //递归获取三级节点Id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogVisibleClosed(){
      this.defKeys=[]
    },
    // 点击为权限分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      console.log(keys);
      const idStr = keys.join(',')
      const{data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !==200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>